Não informado. (2004). Half-yearly abstract of the medical sciences. [s.n.].
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Half-yearly Abstract of the Medical Sciences. London: [s.n.], 2004.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Half-yearly Abstract of the Medical Sciences. [s.n.], 2004.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.